Zobrazeno 1 - 10
of 220
pro vyhledávání: '"Oleś K"'
We find that an oscillon can possess a characteristic double oscillation structure even though it results in a decay of a sphaleron which does not have any positive energy vibrational mode. We show that dynamics of such an oscillon can still be captu
Externí odkaz:
http://arxiv.org/abs/2309.11167
Autor:
Alonso-Izquierdo, A., Navarro-Obregón, S., Oles, K., Queiruga, J., Romanczukiewicz, T., Wereszczynski, A.
We construct a simple field theory in which a sphaleron, i.e., a saddle-point particle-like solution, forms a semi-BPS state with a background defect that is an impurity. This means that there is no static force between the sphaleron and the impurity
Externí odkaz:
http://arxiv.org/abs/2308.14420
We analyze the perturbative Relativistic Moduli Space approach, where the amplitudes of the Derrick modes are promoted to collective coordinates. In particular, we analyse the possibility to calculate the critical velocity, i.e., the initial velocity
Externí odkaz:
http://arxiv.org/abs/2304.14076
Autor:
Adam, C., Martín-Caro, A. García, Huidobro, M., Oles, K., Romanczukiewicz, T., Wereszczynski, A.
We show that constrained $CP^1$ instantons, combined with the Relativistic Moduli Space approach, can accurately describe kink-antikink collisions in the $\phi^4$ model.
Comment: 8 pages, 5 figures
Comment: 8 pages, 5 figures
Externí odkaz:
http://arxiv.org/abs/2212.11936
We find that for various solitonic processes the corresponding canonical moduli space can have a boundary which is accessible in a finite time evolution. We show that such a boundary is not a failure of the moduli space approach but has a physical me
Externí odkaz:
http://arxiv.org/abs/2210.09068
We show that thick spectral walls exist in antikink-kink collisions in the $\phi^6$ model. In this model, they are triggered by the so-called $delocalized$ $modes$ which do not exist in the single-soliton sector but emerge in antikink-kink ($\bar{K}K
Externí odkaz:
http://arxiv.org/abs/2209.11479
Autor:
Adam, C., Dorey, P., Martin-Caro, A. Garcia, Huidobro, M., Oles, K., Romanczukiewicz, T., Shnir, Y., Wereszczynski, A.
Antikink-kink ( $\bar{\rm K} $$ {\rm K}$) collisions in the $\phi^6$ model exhibit resonant scattering although the $\phi^6$ kinks do not support any bound states to which energy could be transferred. In Phys. Rev. Lett. 107 (2011) 091602 it was conj
Externí odkaz:
http://arxiv.org/abs/2209.08849
The moduli space approximation to kink dynamics permits a relativistic generalization if the Derrick scaling parameter is used as a collective coordinate. We develop a perturbative approach to the resulting relativistic moduli space by expanding the
Externí odkaz:
http://arxiv.org/abs/2111.06790
We show that in some kink-antikink (KAK) collisions sphalerons, i.e., unstable static solutions - rather than the asymptotic free soliton states - can be the source of the internal degrees of freedom (normal modes) which trigger the resonance phenome
Externí odkaz:
http://arxiv.org/abs/2109.01834
Publikováno v:
Phys. Rev. Lett. 127, 071601 (2021)
The fractal velocity pattern in symmetric kink-antikink collisions in $\phi^4$ theory is shown to emerge from a dynamical model with two effective moduli, the kink-antikink separation and the internal shape mode amplitude. The shape mode usefully app
Externí odkaz:
http://arxiv.org/abs/2106.05153